firewall: Simple firewall building rules and script
firewall: Adjust template variables.
firewall: Fix modules path

The next major release of puppet will require "modules" to be part of
the path.
firewall: Add dependency to forwarding rule.
firewall: Extend forwarding accept rule filename
Revert "firewall: Add dependency to forwarding rule."

This reverts commit 130be87ccf02f2eefefe6e2429782afcaca21a10.